Results 101 to 110 of about 44,169 (308)

Automated Ultrasound Object Segmentation Using Combinatorial Active Contour Method

Jurnal Ilmu Komputer dan Informasi
Active Contour (AC) is an algorithm widely used in segmentation for developing Computer-Aided Diagnosis (CAD) systems in ultrasound imaging. Existing AC models still retain an interactive nature.
Anan Nugroho, Budi Sunarko, Hari Wibawanto, Anggraini Mulwinda, Anas Fauzi, Dwi Oktaviyanti, Dina Wulung Savitri   +6 more
doaj   +1 more source

A Fast Region-Based Segmentation Model with Gaussian Kernel of Fractional Order

Advances in Mathematical Physics, 2013
By summarizing some classical active contour models from the view of level set representation, a simple energy function expression with the Gaussian kernel of fractional order is proposed, and then a novel region-based geometric active contour model is ...
Bo Chen, Qing-Hua Zou, Wen-Sheng Chen, Yan Li   +3 more
doaj   +1 more source

A Novel Edge Preserving Active Contour Model Using Guided Filter and Harmonic Surface Function for Infrared Image Segmentation

IEEE Access, 2018
Infrared image segmentation is a useful and challenging research subject due to its inherent limitations, such as complicated noises, vague edges, and low contrast in infrared images.
Shiping Zhu, Xiaoyan Bu, Qin Zhou
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Thermal Infrared Pedestrian Image Segmentation Using Level Set Method

Sensors, 2017
The edge-based active contour model has been one of the most influential models in image segmentation, in which the level set method is usually used to minimize the active contour energy function and then find the desired contour.
Yulong Qiao, Ziwei Wei, Yan Zhao
doaj   +1 more source

Directional Geodesic Active Contours

, 2012
We present a non-conformal metric that generalizes the geodesic active contours approach for image segmentation. The new metric is obtained by adding to the Euclidean metric an additional term that penalizes the misalignment of the curve with the image ...
Ronda Prieto, José Ignacio, Gallego Bonet, Guillermo, Valdés Morales, Antonio   +2 more
core  

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

The Potential of Active Contour Models in Extracting Roads from Mobile Laser Scanning Data

, 2017
Active contour models present a robust segmentation approach which make efficient use of specific information about objects in the input data rather than processing all the data.
Tim McCarthy, Paul Lewis, Pankaj Kumar
core   +1 more source

Mixed‐class J‐domain protein scaffolds promote expanded aggregate handling and multivalent Hsp70 engagement during functional disaggregase assembly

FEBS Letters, EarlyView.
Protein aggregates threaten proteostasis and cell health. In human cells, Hsp70–J‐domain protein‐based disaggregases remove aggregates, but how they assemble remains unclear. Our biochemical findings show that DNAJA2‐ and DNAJB1‐containing disaggregase scaffolds enhance luciferase aggregate targeting, and that Hsp70 recruitment by both J‐domain ...
Anna Szlachcic, Nadinath B. Nillegoda
wiley   +1 more source

Restoration and Segmentation of Old Jawi Manuscripts using Variational Image Inpainting and Active Contour Models

Journal of ICT
Old Jawi Manuscripts (OJM) are crucial to historical studies, offering insights into past societies. However, degradation from mishandling and environmental factors can impair their legibility.
Akmal Shafiq Badarul Azam, Abdul Kadir Jumaat, Amisha Balkis Badarul Azam, Nur Afiqah Sabirah Mohammad Sabri, Amiratul Munirah Yahaya, Ahmad Thaqif Ismail, Muhammad Anas Abdul Razak, Mohd Azdi Maasar, Mohamed Faris Laham   +8 more
doaj   +1 more source